I have a 92 civic HB and a JDM B18C3 motor the same as a USDM GSR, and I need to know what i need for the exauhst set up??? I have comptech GSR headers and i welded a bung on them for my O2 sensor but they dont bolt on to the factory cat and or the pipe right before the cat. what should i do get a TEG cat back or a civic or can i just get a piece from the junk yard??? Any tip would be appriciated!

 

First of all, a B18C3 isn't JDM. I'm pretty sure it's european. Maybe aussie.

I would get an aftermarket highflow cat and then catback exhaust of your choice. Check out www.kteller.com they make piping kits which should be sized properly for that motor in that car.